Thispaperisconcernedwiththenumericalstudiesontheloadingrateeffectonthefracture behaviour of high-strength concrete. Numerical analysis has been carried out through employing ANSYSParametricDesignLanguage(APDL).Three-point-bend tests are simulated for six different loading rates, spanning seven orders of magnitude, from 10−4 to 103 mm/s. In order to correctly capture the experimental results,…
Thispaperisconcernedwiththenumericalstudiesontheloadingrateeffectonthefracture behaviour of high-strength concrete. Numerical analysis has been carried out through employing ANSYSParametricDesignLanguage(APDL).Three-point-bend tests are simulated for six different loading rates, spanning seven orders of magnitude, from 10−4 to 103 mm/s. In order to correctly capture the experimental results, two types of cohesive law, one for low loading rates and the other for high loading rates, both are dependent on the crack opening velocity, are implemented. The fitting parameters for both laws are given and the application range specified. In addition, by calculating the energy evolution, we are able to validate the hypothesis of Bathia et al. for measuring dynamic fracture energy. Finally, relevant information on crack advancing speed and opening velocity is also extracted and compared to available experimental data.